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646 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14
Heller described the species from the Adriatic Sea, Hincks redescribed
it from Great Britain, and O'Donoghue listed it from several localities
in British Columbia and Puget Sound. It is possible that the species
should be placed in the genus Tubulipora, but our specimens are incomplete in certain respects which prevent a final judgment. It has much
resemblance to D. intermedia O'Donoghue but the measurements are
larger and the fertile branches are adnate.
Point Barrow, Alaska, 21 fms, Arctic Research Laboratory, G. E.
MacGinitie, collector. Also two specimens from Nash Harbor, Nunivak
Island, Bering Sea, 8-10 fms, on a shell.
Diaperoecia intermedia (O'Donoghue), 1923
Plate 70, fig. 5
Tubulipora intermedia O'Donoghue, 1923:10.
Diaperoecia intermedia, O'Donoghue, 1926:23.
The zoarium is encrusting and branching, with short erect or semierect
branches which form small capitula. The zooecial tubes are all on the
ventral side. The stalks of the free branches are about 0.60 to 0.70 mm
wide and the capitula may reach a maximum width of 3 mm. The peristomes are all free and moderately long to a maximum of 0.90 mm,
width 0.16 mm, the aperture 0.13 mm.
The ovicell has its origin on the ventral side and expands upon the
top of the capitulum where it surrounds several peristomes; it is considerably inflated and thickly perforated. The ooeciostome is more or
less connected with a peristome at its base, nearly as tall as a peristome,
and noticeably smaller, its aperture 0.10 mm in diameter, varying in its
position but usually somewhere near the middle of the expansion.
O'Donoghue very properly questioned the generic position of this
species, as the adnate portion of the zoarium is similar to that of
Proboscina and the ovicell bears some resemblance to that of Tubulipora.
The nature of the ovicell, enclosing a number of tubules, and especially
the position of the ooeciostome near the middle of the expansion (occasionally quite proximal to it) suggest Diaperoecia where O'Donoghue
finally placed it. It may possibly be one of the various northern species
which have been described without the ovicell but there is at present no
proof of synonymy.
The species was described from Departure Bay, British Columbia.
Our specimens are from Point Barrow, Alaska, 125 to 522 feet, G. E.
MacGinitie, collector, common on shells and rocks.

646 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14
Heller described the species from the Adriatic Sea, Hincks redescribed
it from Great Britain, and O'Donoghue listed it from several localities
in British Columbia and Puget Sound. It is possible that the species
should be placed in the genus Tubulipora, but our specimens are incomplete in certain respects which prevent a final judgment. It has much
resemblance to D. intermedia O'Donoghue but the measurements are
larger and the fertile branches are adnate.
Point Barrow, Alaska, 21 fms, Arctic Research Laboratory, G. E.
MacGinitie, collector. Also two specimens from Nash Harbor, Nunivak
Island, Bering Sea, 8-10 fms, on a shell.
Diaperoecia intermedia (O'Donoghue), 1923
Plate 70, fig. 5
Tubulipora intermedia O'Donoghue, 1923:10.
Diaperoecia intermedia, O'Donoghue, 1926:23.
The zoarium is encrusting and branching, with short erect or semierect
branches which form small capitula. The zooecial tubes are all on the
ventral side. The stalks of the free branches are about 0.60 to 0.70 mm
wide and the capitula may reach a maximum width of 3 mm. The peristomes are all free and moderately long to a maximum of 0.90 mm,
width 0.16 mm, the aperture 0.13 mm.
The ovicell has its origin on the ventral side and expands upon the
top of the capitulum where it surrounds several peristomes; it is considerably inflated and thickly perforated. The ooeciostome is more or
less connected with a peristome at its base, nearly as tall as a peristome,
and noticeably smaller, its aperture 0.10 mm in diameter, varying in its
position but usually somewhere near the middle of the expansion.
O'Donoghue very properly questioned the generic position of this
species, as the adnate portion of the zoarium is similar to that of
Proboscina and the ovicell bears some resemblance to that of Tubulipora.
The nature of the ovicell, enclosing a number of tubules, and especially
the position of the ooeciostome near the middle of the expansion (occasionally quite proximal to it) suggest Diaperoecia where O'Donoghue
finally placed it. It may possibly be one of the various northern species
which have been described without the ovicell but there is at present no
proof of synonymy.
The species was described from Departure Bay, British Columbia.
Our specimens are from Point Barrow, Alaska, 125 to 522 feet, G. E.
MacGinitie, collector, common on shells and rocks.